C# 文件上传服务器

 private bool HttpUploadFile(string url, string path)        {            bool result = false;            try            {                // 设置参数                HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;                NetworkCredential d = new NetworkCredential("USERNAME", "PASSWORD");//添加此代码                request.Credentials = d;                CookieContainer cookieContainer = new CookieContainer();                request.CookieContainer = cookieContainer;                request.AllowAutoRedirect = true;                request.Method = "POST";                string boundary = DateTime.Now.Ticks.ToString("X"); // 随机分隔线                request.ContentType = "multipart/form-data;charset=utf-8;boundary=" + boundary;                //request.ContentType = "application/json;charset= utf-8";                byte[] itemBoundaryBytes = Encoding.UTF8.GetBytes("\r\n--" + boundary + "\r\n");                byte[] endBoundaryBytes = Encoding.UTF8.GetBytes("\r\n--" + boundary + "--\r\n");                int pos = path.LastIndexOf("\\");                string fileName = path.Substring(pos + 1);                //请求头部信息                 //string header = "/api/containers/" + UserManager.Instance.CurrUser.Email + "/upload?access_token=" + UserManager.Instance.CurrUser.Token;                //StringBuilder sbHeader = new StringBuilder(header);                StringBuilder sbHeader = new StringBuilder(string.Format("Content-Disposition:form-data;name=\"file\";filename=\"{0}\"\r\nContent-Type:application/octet-stream\r\n\r\n", fileName));                byte[] postHeaderBytes = Encoding.UTF8.GetBytes(sbHeader.ToString());                FileStream fs = new FileStream(path, FileMode.Open, FileAccess.Read);                byte[] bArr = new byte[fs.Length];                fs.Read(bArr, 0, bArr.Length);                fs.Close();                Stream postStream = request.GetRequestStream();                postStream.Write(itemBoundaryBytes, 0, itemBoundaryBytes.Length);                postStream.Write(postHeaderBytes, 0, postHeaderBytes.Length);                postStream.Write(bArr, 0, bArr.Length);                postStream.Write(endBoundaryBytes, 0, endBoundaryBytes.Length);                postStream.Close();                //发送请求并获取相应回应数据                HttpWebResponse response = request.GetResponse() as HttpWebResponse;                //直到request.GetResponse()程序才开始向目标网页发送Post请求                Stream instream = response.GetResponseStream();                StreamReader sr = new StreamReader(instream, Encoding.UTF8);                //返回结果网页（html）代码                string content = sr.ReadToEnd();                result = response.StatusCode == HttpStatusCode.OK;            }            catch (Exception ex)            {                return false;            }            return result;        }